Coil-former for armatures.



UNITED STATES PATENT OFFICE.

JOHN A.. WIRTH, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO WESTINGHOUSE ELECTRIC AND MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIIL COIL-FORMER FOR ARMATURES.

Specification of Letters Patent.

Original application filed January 26, 1910, Serial No. 540,210. Divided and this application filed July 17, 1912. Serial No. 710,029.

T0 all whom it may concern:

Be it known that I, JOHN A. IVIRTH, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Coil-Formcrs for Armatur-es, of which the following is a specification, this application being a division of application Serial No. 540,210, filed January 26, 1910.

My invention relates to apparatus for forming armature coils for dynamo-electric machines, and it has special reference to apparatus for forming half-turn armature coils.

The object of my invention is to provide a simple forming apparatus which shallbe adjustable to suit armature coils of diiferent sizes and be adapted for readily and accurately producing coils of the type above indicated.

In Patent No. 838,017, granted December 11, 1906, to the IVestinghouse Electric 8'. Manufacturing Company, as assignee of \Villiam H. Foot, a coil former is shown and described which comprises a base or stand having a cylindrically curved surface and a plurality of steel blocks or forming tools adjust-ably secured to the base.

In my application, Serial No. 540,210, of which this application is a division, I have set forth and described a device which I term, for convenience, a radius bender for making the principal bends in a half coil, said device having a gage for so adjusting the relative positions of the several conductors of which a single coil is constructed, when they are clamped in the bender, that the terminals of the coils shall be of the desired len h.

Accor ing to my present invention, I provide a former of the same general character as that shown and described in the above named Foot patent, which is equipped with several novel features that particularly adapt it for completing partially formed co1 s.

Figure l is an end elevation of a portion of a former for completing a partially formed coil which is constructed in accordance with my invention, a half-turn armature coil being shown in position thereon. Fig. 2 is a plan view of the device, a portion of which is shown in Fig. 1. Figs. 3

and 4 are detail views of certain of the parts of the former shown in Figs. 1 and 2, and Fig. 5 is a detail plan view of one end of the device shown in Figs. 1 and 2.

Referring to the drawings, the structure illustrated comprises a base 1 having a cylindrically curved surface 2, a raised portion 3 which constitutes a forming tool, a pair of removable forming tools 4 and 5, two sets of spacing fingers G and 7, removable guide blocks 8 and a templet 9.

The spacing ngers 6 and 7 are respectively pivoted upon pins 10 and 11 and are spaced apart by washers 12 which are located between them on the pins. The guide blocks 8 are pivotally mounted upon pins 13 and 14. The templet 9 is pivoted upon the pin 14 and is provided with a projection 15 having a stepped or notched surface 10, and with a handle 15a by means of which it may be turned into and out of operative i position, as shown in Figs. 3 and 5 of the drawings. The tool 3 is integral with, and the tools 4 and 5 are each secured to the base 1 and project above the curved surface 2 which corresponds, in its radius of curva- 1 ture, to that of the armature for which the coils are intended.

The process of forming a half-turn coil on the device described above, is as follows: Assuming that the general form of the coil has been produced in a radius bender, such as that shown and described in my application above referred to, if the templet. 9 occupies the position shown in Figs. 2 and 5 of the drawings, the strap conductors are adjusted, relative to each other, until their ends respectively engage the steps or notches 16 on the projection 15, after which they are assembled adjacent to the surface 17 of the tool 3 and are held in place by the tool 4. They are then rolled or hammered back over the curved surface of the base 1, this bend having been approximated by the radius bender. The bend 18 is then accurately formed andthe conductors are afterward securely clamped in position against the surface 19 of the tool 3 by a clamp 20, shown in detail in Fig. 4. The bend 21 is then formed accurately and the conductors are bent or hammered over the curved surface of the base 1, following the surface 22. The tool 5 is then so adjusted as to iirmly hold the corresponding ends of the conductors in position. The outer strap of the bundle is then bent back at its ends against the surfaces 23 and 24 of the tools 4 and 5 and lingers G and 7, constituting one pair, are turned into position against the ends which are already bent over. The ends of the next adjacent strap are then similarly bent against the outer surface of the fingers, the lingers constituting another pair, are turned into position, and so on, until all the stra s have been bent out at their ends. T e blocks or levers 8 are then turned on the pins 13 and 14 to hold the ends lof the inner strap in position. The stepped 0r notched surfaces of the templet 9 are so proportioned that, when the ends of the straps are bent back, as above indicated, they all terminate in a single plane perpendicular to them. Clamps 25 and 2G are provided for the purpose of holding the straps formed against the surfaces 17 and 22 when the bends 18 and 21 are first mat'e in them, The spacin fingers G and 7 are made of such form an dimensions that the pins 10 and 11, on which they are mounted, do not interfere with the straps of which the coil is formed, if the lengths of `the straps have not been carefull determined in the manner above describe The former illustrated and described may be varied in size and details within the spirit and scope of my invention.

I claim as my invention:

1. A coil former comprising a base having a curved surface, one rincipal tool projeoting upwardly there rom, clamps for holding the conductors in engagement with the surface of the tool during the coil-forming operation, and a plurality of pivotally mounted spacing fingers for determining the formation o the terminals of the conductors and their relations to each other.

2. A `coil former comprising a base having a curved surface2 a principal tool thereon, a clamp for holding the conductors during the .coil-forming operation n engage-- ment with one surface of the tool, a removable templet for determining the relative longitudinal positions of the several conductors, and a plurality of pivotally attached spacing fingers for forming the terminals of the conductors.

3. A coil former comprising a base having a cylindrically curved surface, a principal tool thereon, means for holding the conductors in engagement with one surface of the tool, a removable forming tool, spaeing members for forming the terminals of the conductors, and a pivoted guide block for holding the conductor terminals in engagement with said forming tool.

4. A coil former comprising a base having a cylindrically curved surface, a principal tool thereon, a means for holding the conductors in engagement with one surface of the principal tool, a removable templet for determining the relative longitudinal position of the several conductors, a removable forming tool for forming the terminals of the conductors, and pivotally mounted fingers for spacing the said terminal from one another.

5. A coil former comprising a base having a curved surface, a principal tool thereon, a means for holding the conductors in engagement with one surface of the principal tool, a removable templet for determining the relative longitudinal position of th( several conductors, a removable forming tool attached to the base and projecting up wardly therefrom, pivotally mounted fin Gers for spacing the conductor terminals from one another, and a guide block for holding the conductor terminals in engage ment with the forming tool and the spacing lingers.

fn testimony whereof, I have hereunt silcribed my name this 2nd Iday of July 1 Roer. L. WILSON, B. B. Hume.

(Jopie: of thi patent may be obtained tar vp cents nach, by addressing the Commissioner ot retenu Washingtomn. i i 

